Sacrifice is obligatory on whom?

Ans: The syllabus of making the obligatory sacrifice is the same as the syllabus of making the obligatory charity obligatory Gold, or fifty-two and a half tola of silver, or an amount equal to its value, or merchandise, or goods in excess of need and use, the value of which is equal to fifty-two and a half tola of silver, or one of them. Or if the sum of some of these five things is equal to the value of fifty two and a half tola of silver, then sacrifice is obligatory on such men and women.